It must be noted that when turning the featuring on, you will be asked enter your address to register Wi-Fi calling with your provider in case emergency services need to locate you without your cellular signal.

According to the Apple, you can also make and receive Wi-Fi calls from a number of its devices, not just iPhones.

"If your carrier supports Wi-Fi Calling on iCloud-connected devices, you can also make and receive Wi-Fi calls on other devices," it explained.

"You can use Wi-Fi Calling on these devices, even if your iPhone isn't on the same Wi-Fi Network or turned on."

The tech giant has said the feature will work with iPad or iPod touch with iOS 9 or later, Apple Watch with watchOS 2 or later and Mac (2012 or later model) with OS X El Capitan.

All you need to do is make sure that you're signed in to iCloud and FaceTime with the same Apple ID that you use on your iPhone and you are good to go.